YHWH is called the fountain of living waters, and prophetic visions associate eschatological water with God's Temple presence and Spirit.
Jeremiah 2:13; Ezekiel 47:1-12; Zechariah 14:8 are central backgrounds.
Jesus directs the thirsty to himself and is identified as the giver of the eschatological Spirit.
John places Jesus in the role of the divine source from whom life-giving water and the Spirit are received.
The crowd divides over Jesus' identity.